CA2275402A1 - Power transmitting fluids with improved anti-shudder durability - Google Patents

Power transmitting fluids with improved anti-shudder durability Download PDF

Info

Publication number
CA2275402A1
CA2275402A1 CA002275402A CA2275402A CA2275402A1 CA 2275402 A1 CA2275402 A1 CA 2275402A1 CA 002275402 A CA002275402 A CA 002275402A CA 2275402 A CA2275402 A CA 2275402A CA 2275402 A1 CA2275402 A1 CA 2275402A1
Authority
CA
Canada
Prior art keywords
power transmitting
shudder durability
fluids
improved anti
transmitting fluids
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA002275402A
Other languages
French (fr)
Other versions
CA2275402C (en
Inventor
Roger Keith Nibert
Manoj Tandon
Raymond Frederick Watts
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ExxonMobil Chemical Patents Inc
Original Assignee
Exxon Chemical Patents, Inc.
Roger Keith Nibert
Manoj Tandon
Raymond Frederick Watts
Exxonmobil Chemical Patents Inc.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Exxon Chemical Patents, Inc., Roger Keith Nibert, Manoj Tandon, Raymond Frederick Watts, Exxonmobil Chemical Patents Inc. filed Critical Exxon Chemical Patents, Inc.
Publication of CA2275402A1 publication Critical patent/CA2275402A1/en
Application granted granted Critical
Publication of CA2275402C publication Critical patent/CA2275402C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10MLUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M163/00Lubricating compositions characterised by the additive being a mixture of a compound of unknown or incompletely defined constitution and a non-macromolecular compound, each of these compounds being essential
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10MLUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M141/00Lubricating compositions characterised by the additive being a mixture of two or more compounds covered by more than one of the main groups C10M125/00 - C10M139/00, each of these compounds being essential
    • C10M141/10Lubricating compositions characterised by the additive being a mixture of two or more compounds covered by more than one of the main groups C10M125/00 - C10M139/00, each of these compounds being essential at least one of them being an organic phosphorus-containing compound
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10MLUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2207/00Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
    • C10M2207/02Hydroxy compounds
    • C10M2207/023Hydroxy compounds having hydroxy groups bound to carbon atoms of six-membered aromatic rings
    • C10M2207/026Hydroxy compounds having hydroxy groups bound to carbon atoms of six-membered aromatic rings with tertiary alkyl groups
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10MLUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2215/00Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant compositions
    • C10M2215/02Amines, e.g. polyalkylene polyamines; Quaternary amines
    • C10M2215/06Amines, e.g. polyalkylene polyamines; Quaternary amines having amino groups bound to carbon atoms of six-membered aromatic rings
    • C10M2215/064Di- and triaryl amines
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10MLUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2215/00Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant compositions
    • C10M2215/086Imides
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10MLUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2215/00Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant compositions
    • C10M2215/22Heterocyclic nitrogen compounds
    • C10M2215/223Five-membered rings containing nitrogen and carbon only
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10MLUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2215/00Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant compositions
    • C10M2215/28Amides; Imides
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10MLUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2219/00Organic non-macromolecular compounds containing sulfur, selenium or tellurium as ingredients in lubricant compositions
    • C10M2219/04Organic non-macromolecular compounds containing sulfur, selenium or tellurium as ingredients in lubricant compositions containing sulfur-to-oxygen bonds, i.e. sulfones, sulfoxides
    • C10M2219/046Overbasedsulfonic acid salts
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10MLUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2219/00Organic non-macromolecular compounds containing sulfur, selenium or tellurium as ingredients in lubricant compositions
    • C10M2219/10Heterocyclic compounds containing sulfur, selenium or tellurium compounds in the ring
    • C10M2219/104Heterocyclic compounds containing sulfur, selenium or tellurium compounds in the ring containing sulfur and carbon with nitrogen or oxygen in the ring
    • C10M2219/106Thiadiazoles
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10MLUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2223/00Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions
    • C10M2223/02Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions having no phosphorus-to-carbon bonds
    • C10M2223/04Phosphate esters
    • C10M2223/047Thioderivatives not containing metallic elements
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10MLUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2223/00Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions
    • C10M2223/02Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions having no phosphorus-to-carbon bonds
    • C10M2223/049Phosphite
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10NINDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2030/00Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
    • C10N2030/06Oiliness; Film-strength; Anti-wear; Resistance to extreme pressure
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10NINDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2040/00Specified use or application for which the lubricating composition is intended
    • C10N2040/04Oil-bath; Gear-boxes; Automatic transmissions; Traction drives
    • C10N2040/042Oil-bath; Gear-boxes; Automatic transmissions; Traction drives for automatic transmissions
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10NINDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2060/00Chemical after-treatment of the constituents of the lubricating composition
    • C10N2060/10Chemical after-treatment of the constituents of the lubricating composition by sulfur or a compound containing sulfur
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10NINDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2060/00Chemical after-treatment of the constituents of the lubricating composition
    • C10N2060/14Chemical after-treatment of the constituents of the lubricating composition by boron or a compound containing boron

Abstract

The anti-shudder durability of power transmitting fluids, particularly automatic transmission fluids, is improved by incorporating a combination of low potency friction modifiers, alkyl phosphites, specific ashless dispersants and a corrosion inhibitor. The anti-shudder durability of these fluids may be further enhanced by inclusion of a metallic detergent.
CA002275402A 1996-12-18 1997-10-20 Power transmitting fluids with improved anti-shudder durability Expired - Lifetime CA2275402C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US08/768,843 US5840663A (en) 1996-12-18 1996-12-18 Power transmitting fluids improved anti-shudder durability
US768,843 1996-12-18
PCT/US1997/018680 WO1998027187A1 (en) 1996-12-18 1997-10-20 Power transmitting fluids with improved anti-shudder durability

Publications (2)

Publication Number Publication Date
CA2275402A1 true CA2275402A1 (en) 1998-06-25
CA2275402C CA2275402C (en) 2007-02-27

Family

ID=25083651

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002275402A Expired - Lifetime CA2275402C (en) 1996-12-18 1997-10-20 Power transmitting fluids with improved anti-shudder durability

Country Status (7)

Country Link
US (1) US5840663A (en)
EP (1) EP0956330B1 (en)
JP (1) JP4317267B2 (en)
AU (1) AU733827B2 (en)
CA (1) CA2275402C (en)
DE (1) DE69740118D1 (en)
WO (1) WO1998027187A1 (en)

Families Citing this family (47)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3184113B2 (en) * 1997-03-24 2001-07-09 東燃ゼネラル石油株式会社 Lubricating oil composition for automatic transmission
JP4663843B2 (en) * 2000-03-29 2011-04-06 Jx日鉱日石エネルギー株式会社 Lubricating oil composition
JP4691233B2 (en) * 2000-06-05 2011-06-01 東燃ゼネラル石油株式会社 Lubricating oil composition for continuously variable transmission
JP4919555B2 (en) 2001-08-30 2012-04-18 Jx日鉱日石エネルギー株式会社 Lubricating oil composition for automatic transmission
JP5283296B2 (en) * 2001-09-17 2013-09-04 Jx日鉱日石エネルギー株式会社 Lubricating oil composition
JP5283297B2 (en) * 2001-09-17 2013-09-04 Jx日鉱日石エネルギー株式会社 Lubricating oil composition
US6534451B1 (en) * 2002-04-05 2003-03-18 Infineum International Ltd. Power transmission fluids with improved extreme pressure lubrication characteristics and oxidation resistance
US20050059561A1 (en) * 2003-09-17 2005-03-17 Nubar Ozbalik Power transmitting fluids and additive compositions
US20050065043A1 (en) * 2003-09-23 2005-03-24 Henly Timothy J. Power transmission fluids having extended durability
US20060063685A1 (en) * 2004-09-22 2006-03-23 Pieter Purmer Lubricant for manual or automated manual transmissions
US20060079412A1 (en) * 2004-10-08 2006-04-13 Afton Chemical Corporation Power transmission fluids with enhanced antishudder durability and handling characteristics
US20060135375A1 (en) * 2004-12-21 2006-06-22 Chevron Oronite Company Llc Anti-shudder additive composition and lubricating oil composition containing the same
JP4677359B2 (en) * 2005-03-23 2011-04-27 アフトン・ケミカル・コーポレーション Lubricating composition
US20060264341A1 (en) * 2005-05-20 2006-11-23 Culley Scott A Transmission composition
US20060264340A1 (en) * 2005-05-20 2006-11-23 Iyer Ramnath N Fluid compositions for dual clutch transmissions
JP2007169570A (en) * 2005-12-26 2007-07-05 Chevron Japan Ltd Lubricating oil composition
CA2662311C (en) * 2006-09-01 2016-05-24 The Lubrizol Corporation Lubricating composition comprising a dispersant, an antioxidant, and a corrosion inhibitor
US8450255B2 (en) * 2006-12-18 2013-05-28 The Lubrizol Corporation Functional fluid
SG188801A1 (en) 2008-03-19 2013-04-30 Lubrizol Corp Antiwear composition and method of lubricating driveline device
JP4988668B2 (en) * 2008-08-11 2012-08-01 Jx日鉱日石エネルギー株式会社 Lubricating oil composition
WO2010138843A2 (en) 2009-05-29 2010-12-02 The Board Of Regents Of The University Of Texas System Acute lymphoblastic leukemia (all) biomarkers
CN102575186A (en) 2009-08-18 2012-07-11 卢布里佐尔公司 Antiwear composition and method of lubricating driveline device
KR101681355B1 (en) 2010-02-19 2016-11-30 인피늄 인터내셔날 리미티드 Wet friction clutch-lubricant systems providing high dynamic coefficients of friction through the use of borated detergents
SG183804A1 (en) 2010-02-19 2012-10-30 Infineum Int Ltd Wet friction clutch-lubricant systems providing high dynamic coefficients of friction through the use of sodium detergents
CN107502414A (en) 2011-02-16 2017-12-22 路博润公司 The method of lubricating composition and lubricating transmission system device
CA2912063A1 (en) 2013-05-14 2014-11-20 The Lubrizol Corporation Lubricating composition and method of lubricating a transmission
US20170015931A1 (en) * 2015-07-16 2017-01-19 Infineum International Limited Method of improving vehicle transmission operation through use of specific lubricant compositions
CA2995956A1 (en) 2015-08-20 2017-02-23 The Lubrizol Corporation Azole derivatives as lubricating additives
EP3371284A1 (en) 2015-11-06 2018-09-12 The Lubrizol Corporation Lubricant composition containing an antiwear agent
EP3371286A1 (en) 2015-11-06 2018-09-12 The Lubrizol Corporation Lubricant composition containing an antiwear agent
CA3005091A1 (en) 2015-11-17 2017-05-26 The Lubrizol Corporation Toxicologically acceptable alkylphenol detergents as friction modifiers in automotive lubricating oils
WO2017218662A1 (en) 2016-06-17 2017-12-21 The Lubrizol Corporation Lubricating compositions
US10711219B2 (en) * 2017-12-11 2020-07-14 Infineum International Limited Automotive transmission fluid compositions for improved energy efficiency
US10955009B2 (en) 2018-04-03 2021-03-23 Borgwarner Inc. Clutch pack having different clutch plate materials
EP3878929A4 (en) * 2018-11-06 2022-09-07 ENEOS Corporation Lubricant composition
EP3736318B1 (en) * 2019-05-09 2022-03-09 Infineum International Limited Transmission fluid composition for improved wear protection
WO2020263964A1 (en) 2019-06-24 2020-12-30 The Lubrizol Corporation Continuous acoustic mixing for performance additives and compositions including the same
US11384311B2 (en) 2019-12-16 2022-07-12 Infineum International Limited High viscosity index comb polymer viscosity modifiers and methods of modifying lubricant viscosity using same
US11685874B2 (en) 2019-12-16 2023-06-27 Infineum International Limited High viscosity index comb polymer viscosity modifiers and methods of modifying lubricant viscosity using same
US11365273B2 (en) 2019-12-16 2022-06-21 Infineum International Limited High viscosity index comb polymer viscosity modifiers and methods of modifying lubricant viscosity using same
JP2023508906A (en) 2019-12-18 2023-03-06 ザ ルブリゾル コーポレイション polymer surfactant compound
US20210292676A1 (en) * 2020-03-19 2021-09-23 Chevron Japan Ltd. Lubricating oil compositions for automatic transmissions
US11441094B2 (en) 2020-10-02 2022-09-13 Jatco Ltd Rejuvenation and/or extension of the lifetime of frictional performance in transmission fluids
US11905488B2 (en) * 2020-10-16 2024-02-20 Infineum International Limited Transmission fluid compositions for hybrid and electric vehicle applications
EP4267708A1 (en) 2020-12-24 2023-11-01 Infineum International Limited Thermally responsive brush polymers having a copolymer backbone and copolymer arms
EP4194531A1 (en) 2021-12-09 2023-06-14 Infineum International Limited Borated detergents and their lubricating applications
JP2023125591A (en) * 2022-02-28 2023-09-07 出光興産株式会社 lubricating oil composition

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4752416A (en) * 1986-12-11 1988-06-21 The Lubrizol Corporation Phosphite ester compositions, and lubricants and functional fluids containing same
US4938880A (en) * 1987-05-26 1990-07-03 Exxon Chemical Patents Inc. Process for preparing stable oleaginous compositions
US5185090A (en) * 1988-06-24 1993-02-09 Exxon Chemical Patents Inc. Low pressure derived mixed phosphorous- and sulfur-containing reaction products useful in power transmitting compositions and process for preparing same
US5534170A (en) * 1988-06-24 1996-07-09 Exxon Chemical Patents Inc. Mixed phosphorus- and sulfur-containing reaction products useful in power transmitting compositions
US5242612A (en) * 1988-06-24 1993-09-07 Exxon Chemical Patents Inc. Mixed phosphorous- and sulfur-containing reaction products useful in power transmitting compositions
IT1229659B (en) * 1989-04-21 1991-09-06 Euron Spa DETERGENT, DISPERSANT AND ANTI-RUST ADDITIVE FOR FUELS AND LUBRICANTS.
JP2924921B2 (en) * 1989-04-25 1999-07-26 モービル・オイル・コーポレーション Lubricant additives
EP0466870B1 (en) * 1990-01-05 1996-02-28 The Lubrizol Corporation Universal driveline fluide
CA2040819A1 (en) * 1990-05-17 1991-11-18 Stephen Norman Lubricant compositions
US5358650A (en) * 1993-04-01 1994-10-25 Ethyl Corporation Gear oil compositions
US5516444A (en) * 1994-10-13 1996-05-14 Exxon Chemical Patents Inc Synergistic combinations for use in functional fluid compositions
US5750476A (en) * 1995-10-18 1998-05-12 Exxon Chemical Patents Inc. Power transmitting fluids with improved anti-shudder durability

Also Published As

Publication number Publication date
AU4758897A (en) 1998-07-15
US5840663A (en) 1998-11-24
CA2275402C (en) 2007-02-27
EP0956330A1 (en) 1999-11-17
DE69740118D1 (en) 2011-03-24
AU733827B2 (en) 2001-05-24
WO1998027187A1 (en) 1998-06-25
EP0956330B1 (en) 2011-02-09
JP4317267B2 (en) 2009-08-19
JP2001506302A (en) 2001-05-15

Similar Documents

Publication Publication Date Title
CA2275402A1 (en) Power transmitting fluids with improved anti-shudder durability
CA2226977A1 (en) Power transmitting fluids with improved anti-shudder durability
CA2227305A1 (en) Lubricating oils of improved friction durability
EP0533426A3 (en) Fluid coupling power transmission with lockup clutch
CA2374996A1 (en) Zinc-free continuously variable transmission fluid
AU7484096A (en) Automatic transmission fluids with improved transmission performance
CA2346319A1 (en) Clutch with one-way torque carrying bearing
MXPA03000386A (en) Cyanomethyl substituted thiazoliums and imidazoliums and treatments of disorders associated with protein aging.
DE69611807T2 (en) Gearbox with double clutch
DE69502352T2 (en) Gearbox with double clutch
EP0577389A3 (en) Fluid coupling power transmission with lockup clutch
ZA952222B (en) Low friction cobalt based coatings for titanium
CA2199307A1 (en) A wireless lan distributed access procedure providing priority for voice transmissions
AU1840095A (en) Undersea hydraulic coupling with metal seals
BR9401460A (en) Friction clutch with automatic wear compensation.
ZA200104181B (en) Small diameter can end with large opening.
EP0995789A3 (en) Lubricating oil composition
AU4454597A (en) Novel benzofuran-4-carboxamides
CA2287517A1 (en) Power transmission fluids containing alkyl phosphonates
AU6349894A (en) Two-piece ostomy appliance with faceplate bistable coupling ring
SG49936A1 (en) Increasing the friction durability of power transmission fluids through the use of oil soluble competing additives
GB2327720B (en) Friction clutch with automatic wear compensation
GB2318847B (en) Friction clutch with wear indicator
JPH0768244B1 (en)
FR2627567B3 (en) MULTI-STAGE GEARBOX HAVING FRICTION CLUTCHES

Legal Events

Date Code Title Description
EEER Examination request
MKEX Expiry

Effective date: 20171020